Granted Patent
Utility
US 6,803,491 · App. 10/712,284
Preparation of lithium phosphate catalysts
Inventor:
Wilfred P. Shum
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Nov 13, 2003
Inventor
Wilfred P. Shum
Assignee (at issue)
Arco Chemical Technology, L.P.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.